如何在JTable单元中单击JButton？
我有一个带有自定义单元格渲染器的JTable。该单元格是一个包含JTextField和JButton的JPanel。 JTextField包含一个整数，当用户单击JButton时，应该增加整数。
问题是当我在JTable单元格中使用它时，无法单击JButton。如何使其可点击？
这是我的测试代码：
public class ActiveTable extends JFrame {
public ActiveTable() {
RecordModel model = new RecordModel();
model.addRecord(new Record());
JTable table = new JTable(model);
EditorAndRenderer editorAndRenderer = new EditorAndRenderer();
table.setDefaultRenderer(Object.class, editorAndRenderer);
table.setDefaultEditor(Object.class, editorAndRenderer);
table.setRowHeight(38);
add(new JScrollPane(table));
setPreferredSize(new Dimension(600, 400));
pack();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setTitle("Active Table");
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new ActiveTable();
}
});
}
class RecordModel extends AbstractTableModel {
private final List<Record> records = new ArrayList<Record>();
@Override
public int getColumnCount() {
return 1;
}
@Override
public int getRowCount() {
return records.size();
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
return records.get(rowIndex);
}
public void addRecord(Record r) {
records.add(r);
fireTableRowsInserted(records.size()-1, records.size()-1);
}
}
class Record {
private int count = 1;
public int getCount() { return count; }
public void increase() { count = count + 1; }
}
class CellPanel extends JPanel {
private Record record;
private final JTextField field = new JTextField(8);
private final Action increaseAction = new AbstractAction("+") {
public void actionPerformed(ActionEvent e) {
record.increase();
field.setText(record.getCount()+"");
JTable table = (JTable) SwingUtilities.getAncestorOfClass(JTable.class, (Component) e.getSource());
table.getCellEditor().stopCellEditing();
}
};
private final JButton button = new JButton(increaseAction);
public CellPanel() {
add(field);
add(button);
}
public void setRecord(Record r) {
record = r;
field.setText(record.getCount()+"");
}
public Record getRecord() {
return record;
}
}
class EditorAndRenderer extends AbstractCellEditor implements TableCellEditor, TableCellRenderer {
private final CellPanel renderer = new CellPanel();
private final CellPanel editor = new CellPanel();
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
renderer.setRecord((Record) value);
return renderer;
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
editor.setRecord((Record) value);
return editor;
}
@Override
public Object getCellEditorValue() {
return editor.getRecord();
}
@Override
public boolean isCellEditable(EventObject ev) {
return true;
}
@Override
public boolean shouldSelectCell(EventObject ev) {
return false;
}
}
}
没有找到相关结果
已邀请:
3 个回复
眠皇
的一种方法。public class TableTest extends JFrame { public TableTest() { this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JTable table = new JTable(new TestModel()); table.getColumnModel().getColumn(1).setPreferredWidth(3); table.getColumnModel().getColumn(2).setPreferredWidth(3); this.add(new JScrollPane(table)); Action increase = new AbstractAction("+") { @Override public void actionPerformed(ActionEvent e) { JTable table = (JTable) e.getSource(); int row = Integer.valueOf(e.getActionCommand()); TestModel model = (TestModel) table.getModel(); model.increment(row, 0); } }; ButtonColumn inc = new ButtonColumn(table, increase, 1); Action decrease = new AbstractAction("-") { @Override public void actionPerformed(ActionEvent e) { JTable table = (JTable) e.getSource(); int row = Integer.valueOf(e.getActionCommand()); TestModel model = (TestModel) table.getModel(); model.decrement(row, 0); } }; ButtonColumn dec = new ButtonColumn(table, decrease, 2); pack(); } public static void main(String[] args) { new TableTest().setVisible(true); } } class TestModel extends AbstractTableModel { List<TestRecord> records = new LinkedList<TestRecord>(); private static class TestRecord { private int val = 0; } public void increment(int row, int col) { records.get(row).val++; fireTableCellUpdated(row, 0); } public void decrement(int row, int col) { records.get(row).val--; fireTableCellUpdated(row, 0); } public TestModel() { records.add(new TestRecord()); records.add(new TestRecord()); } @Override public Class<?> getColumnClass(int col) { if (col == 0) { return Integer.class; } else { return ButtonColumn.class; } } @Override public boolean isCellEditable(int row, int col) { return true; } @Override public int getColumnCount() { return 3; } @Override public int getRowCount() { return records.size(); } @Override public Object getValueAt(int row, int col) { if (col == 0) { return records.get(row).val; } else if (col == 1) { return "+"; } else { return "-"; } } }亨尖玛次酥
而我使用。他的榜样确实有效，但不是我的。 我找到的解决方案是我必须在TableModel中实现，所以添加了这个方法，我的示例有效：@Override public boolean isCellEditable(int rowIndex, int columnIndex) { return true; }揽芳僵迷仇